EP 0093764 B1 19860312 - THERMALLY-ACTIVATED TIME-TEMPERATURE INDICATOR
Title (en)
THERMALLY-ACTIVATED TIME-TEMPERATURE INDICATOR
Publication
Application
Priority
US 32137281 A 19811116
Abstract (en)
[origin: WO8301834A1] Device which visually indicates exposure to a temperature within a predetermined range for a predetermined length of time. The device may be used in the fast food industry to make certain that all food sold has been recently prepared. An opaque microporous sheet has a colored stratum on the back and a transparent fusible coating on the face. The coating is a solid solution of amorphous rubbery polymer in crystallizable solvent which, upon melting, gradually penetrates and transparentizes the microporous layer, rendering the colored stratum visible.
IPC 1-7
IPC 8 full level
G01K 3/00 (2006.01); G01K 3/04 (2006.01); G01K 11/06 (2006.01)
CPC (source: EP US)
G01K 3/04 (2013.01 - EP US); Y10S 252/962 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8301834 A1 19830526; AU 1011782 A 19830601; AU 566175 B2 19871008; CA 1185157 A 19850409; DE 3269863 D1 19860417; EP 0093764 A1 19831116; EP 0093764 B1 19860312; JP S58501920 A 19831110; US 4428321 A 19840131
DOCDB simple family (application)
US 8201490 W 19821020; AU 1011782 A 19821020; AU 1011783 A 19821020; CA 413990 A 19821022; DE 3269863 T 19821020; EP 82903549 A 19821020; JP 50354382 A 19821020; US 32137281 A 19811116